html, body, #app {
    margin: 0;
    height: 100%;
    width: 100%;
}
#app{
    position: relative;
    width: 100%;
    height: 100%;
}
div {
    display: block;
}
ul{
    padding: 0px;
    display: block;
    list-style-type: disc;
    margin-block-start: 1em;
    margin-block-end: 1em;
    margin-inline-start: 0px;
    margin-inline-end: 0px;
}
ul ul{
    list-style-type: circle;
    margin-block-start: 0px;
    margin-block-end: 0px;
}
li{
    list-style-type: none;
    display: list-item;
    text-align: -webkit-match-parent;
}
button:hover{
    cursor: pointer;
}
.bt{
    color: brown;
}
.btn-default{
    border:none;
    background-color:transparent;
    font-size:18px;
    font-weight:bold;
    text-decoration: none;
    color:inherit;
}
.btn-active{
    border:none;
    background-color:transparent;
    font-size:18px;
    font-weight:bold;
    text-decoration: none;
    color:red;
}